CVE-2021-24608: strategy11 formidable_form_builder Cross-site Scripting
Vulnerability summary
CVE-2021-24608 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in strategy11 formidable_form_builder. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.6% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 0 · Duplicates 1Timeline
- 25-10-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
The Formidable Form Builder – Contact Form, Survey & Quiz Forms Plugin for WordPress plugin before 5.0.07 does not sanitise and escape its Form's Labels, allowing high privileged users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed
CVSS metrics
3 scores · 2 sources · 2 versions- wordfenceSource4.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.68%
Chance of exploitation in the next 30 days
Percentile
52%
Versus all other CVEs
30-day change
0.00 pp
From 0.68% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Strategy111 product
- formidable_form_builder< 5.0.07
Unknown1 product
Wordpress1 product
- formidable< 5.0.07
3 vendors · 3 products
References
3 links- wpscan.com/vulnerability/75305ea8-730b-4caf-a3c6-cb94adee683cX Refsource MISCExploitThird Party Advisory